See also:

Activating HDC
Press the button; the LED above the button lights up. ...

Panic mode
In dangerous situations, trigger the alarm system: Press the button on the remote control for at least 3 seconds. To switch off the alarm: press any button. ...

Malfunction
Comfort Access may not function properly if it experiences interference from external sources such as mobile phones, metal objects, overhead power lines, transmission towers, etc. In this case, ...